As a card collector I would say that releasing different insert sets could be a nice touch. For example, "High Flyers" would perhaps be a series of receivers jumping up high into the air to make their catches. Or "Brick Wall" would be a series of cards featuring the leagues best offensive linemen. "Snipers" for the most accurate Quarterbacks. I also think a series of cards featuring highlights from the previous season would be interesting. Big games, comeback victories, incredible single player performances. These things could be valuable for players and teams because you will be commemorating their achievements during the season. For whoever wins the league you could do a series of cards called "Road to the Ultimus" detailing pivotal games, moments, and players in their championship season.
In the real world Topps does a series called "Topps now" which are cards that can only be purchased online and only during a short window of time. Usually either 48 hours or one week. I think if the site sold limited edition Dotts cards that were only available for a small amount of time it would increase the collectability of them and people would strive to complete their collections by getting those cards as well, which ultimately makes money a more important aspect of contracts and the league by creating a commodity that is desirable to spend it on.
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In the real world Topps does a series called "Topps now" which are cards that can only be purchased online and only during a short window of time. Usually either 48 hours or one week. I think if the site sold limited edition Dotts cards that were only available for a small amount of time it would increase the collectability of them and people would strive to complete their collections by getting those cards as well, which ultimately makes money a more important aspect of contracts and the league by creating a commodity that is desirable to spend it on.
(229 words)